NEW YORK, May 5. /TASS/. The San Diego County Medical Examiner Office said on Wednesday Russian citizen Igor Ziazian, who had been detained on the U.S.-Mexican border while trying to get to the U.S., died at a U.S. detention facility of a "hypertensive and atherosclerotic cardiovascular disease."

As a contributing condition, the Medical Examiner cited an "aortic valve disease." The manner of death is cited as natural.

Ziazin, 46, died on Sunday night while paramedics were transporting him from the Otay Mesa Detention Facility in San Diego to hospital. Prior to that, prison officers and medics had found him unresponsive on his bunk.

Ziazin was handed to the U.S. Immigration and Customs Enforcement Service (ICE) and taken to custody on April 24 after an attempt to get to the U.S. via the San Ysidro border crossing station where he showed his Russian passport to the officials who established later the fact of his previous deportation from the U.S. in 2009.

While in custody, he awaited an interview with an official from the Citizenship and Immigration Services in order to map out further steps in this case.

ICE also said Ziazin’s scanning through databanks showed he had no sentences for criminal offenses in the U.S.